Dopa Drill: a joke study app built with Opus 5.5, now open source
Author’s claim: Claude Opus 5.5 · not verified by us
About the post
A playful drill app its author built to try Opus 5.5. After teachers asked about it, the author published the code under MIT—excluding the mascot character, name and logo.
Our summary. The author’s own words are in the post above; we do not copy them.
Prompt
Not known. We have not found a prompt published by the author.
What we know
- Model
- Claude Opus 5.5 (author’s claim)
- Posted
- Sep 28, 2026
- Length
- Not known
- What we checked
- Author’s post and repository LICENSE read on September 29; the live demo (dopa-drill.tanosix.com) responded. We did not audit the code.
- Longer write-up
- Read our notes on this work
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